• Journal of Mushroom
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• v.21 no.4
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• pp.254-260
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• 2023

The characteristics and spore production of Gonji7ho, Bunhong, and Sunjung fruiting bodies were assessed at different growth stages. The shape of the Pleurotus species fruiting body starts out short and small, then takes on a typical mushroom shape as it grows. Gonji7ho has a long stalk, Bunhong has a short stalk and a wide cap, and Sunjung's cap and stalk dimensions are intermediate. Each variety displayed deep color at the beginning of growth but became steadily lighter with continued growth. The shape of the linkage between the mushroom stalk and cap changed from an initial central position to a lateral position after the growing stage. Gonji7ho cap diameter increased 7-fold from 15.5 mm (5 days of growth) to 37.9 mm (9 days of growth). Growth rates for each growth day measured using the growth percentage of the previous day were 285.5% (5 → 6th day), 182.2% (6 → 7th day), 129.4% (7 → 8th day), and 103.8% (8 → 9th day). This trend was also observed in Bunhong and Sunjung, but Bunhong's growth rate was more rapid (4.9 fold on day 6, 2.7 fold on day 7) and continued to increase through day 9. Harvest yield, which is of greatest interest to farmers, displayed a similar trend spanning the growth period, as did cap diameter. Gonji7ho harvest yield increased rapidly until day 7 of growth (more than 177%), then growth slowed down beginning around day 8, and further decreased on day 9 (98%). Similar trends were observed in Bunhong and Sunjung. Bunhong showed characteristic rapid growth in harvest yield (4.9 fold compared to the previous day on day 6 and 2.7 fold on day 7), and the increase continued through day 9. A decrease in mushroom harvest yield commonly seen in the late growth stage is thought to be due to the death of some mushrooms and decomposition of cap tissue. Basidiospore content increased with number of growth days but decreased after day 8. Gonji7ho yielded the highest production on day 7 of growth, coinciding with harvest time, with 209,000,000 spores. This trend was also observed in Bunhong and Sunjung. These results will provide researchers with basal data and guide farmers in selecting the optimal harvest day.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.151-155
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• 1998

본 실험은 무등산수박과 달고나수박으로 98년 4월 2일에 파종하여 4월 24일 토양과 펄라이트＋코코피트 혼합배지에 각각 정식하였다. 무등산수박과 달고나수박의 재배방법에 따른 생장결과를 보면 엽수는 달고나수박이 많은 반면 총엽면적은 무등산수박이 높게 나타났다. 생체중 및 건물중에 있어서도 달고나수박보다 무등산수박이 더 높게 나타났으며 토양재배보다 양액재배 수박이 더 월등한 생장차이를 나타내었다. 당도는 달고나 수박이 무등산수박보다 훨씬 더 높은 반면 과실무게는 무등산수박이 더 높게 나타났다. 엽병내 질소흡수량은 생육초기에는 26,000-30,000prm 정도이었고 수분후 33일에는 38,000-44,000ppm 정도로 상승하였다. 인산은 생육초기 4,000-8,800ppm 정도에서 수확기에 이르면 480-l,600ppm 정도로 감소하였다. 칼륨은 생육초기에 10,000-26,000ppm 정도였으나 수분기부터는 8,000-14,000ppm 범위로 흡수되었다. 칼슘의 흡수는 생육초기에는 앙액재배 수박이 52,000-5,700ppm 범위로 토양재배 수박의 2,700-3,900ppm 범위보다 약간 많은 것으로 나타났지만 생육이 진전됨에 따라 토양재배 수박의 흡수량이 양액재배 수박의 흡수량보다 많아지는 경향이었다. 마그네슘의 흡수는 생육초기에 토경에서 훨씬 더 용이하게 흡수되는 경향이었으나 수분기부터는 200-700ppm 범위로 일정하였다.

• Journal of Bio-Environment Control
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• v.30 no.4
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• pp.251-256
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• 2021

This study aimed to compare the growth and production of paprika (Capsicum annuum) planted directly on a coir substrate slab according to the bending methods. The existing root direction was bent to 0° (I-type), 90° (L-type), and 180° (U-type), respectively. The weekly average growth such as stem length, diameter, and leaf area tended to be the highest in the I-type bending, but there was no statistical difference. Root weight at 46 weeks after planting was also about 1.3 to 1.7 times heavier in the I-type than the L- and U-type bending. As the yield produced by 330 plants by bending methods, the initial yield was the highest in the U-bending, but then the highest in the I-bending. Accordingly, the total yield was the highest in I-bending. Consequently, when planting on coir substrates directly in paprika cultivation, the I-type bending should be considered most suitable for securing root and plant vigor in the early stages of planting and for enhancing fruiting stability.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.68 no.4
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• pp.383-391
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• 2023

This study aimed to investigate the effect of manure compost content on early growth of maize in barren soils, to establish cultivation techniques that can increase maize yields on barren soils and to provide information on cultivation techniques. The results showed that in the manure compost treatments (1,500 and 1,000 kg/10a), yields increased with increasing amounts of manure compost compared to those of standard fertilization and decreased with decreasing amounts of manure compost. In addition, in fields with the no manure compost treatment (0 kg/10a), yields decreased overall compared to yields of fields treated with manure compost (1,500 and 1,000 kg/10a) regardless of the amount of fertilization. Maize growth was good irrespective of variety when compost was applied in high amounts to the barren soil, but poor initial growth was observed in all varieties in the untreated plots where no compost was applied to the barren soil. These results confirm that maize is affected by organic (manure compost) fertilizer in all aspects of its growth, and that a minimum of 1,000 kg/10a of manure compost and two-thirds (0.6) of chemical fertilizer should be applied to ensure stable maize yields, particularly when maize is grown on barren soils.

• Journal of Yeungnam Medical Science
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• v.4 no.1
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• pp.17-23
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• 1987

New born rat heart cells were dissociated using trypsin and/or collegenase to elucidate the dissociation efficiency of these two enzymes. And the effect of dimethyl sulfoxide during and immediately after cell dissociation was also investigated to clarify the so-called protective activity of dimethyl sulfoxide on cell performance. The results can be summarized as follows. 1. Cold trypsin 18 hours pretreatment followed by warm collagenase treatment resulted best cell viability and cell yield. 2. Single, warm trypsin treatment gave the poorest result. 3. Dimethyl sulfoxide did not seem to play any protective role during or immediately after rat heart cell dissociation. It had very damaging effect on rat heart cells.

• Journal of Bio-Environment Control
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• v.18 no.2
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• pp.101-106
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• 2009

To study the effect of nonwoven fabric materials on growth and yield of korea melon, Medium denier nonwoven fabrics (MDNF), Polyster nonwoven fabrics (PENF) and 12 ounce nonwoven fabric (control) were used. Mean temperature at night was 13.1$^{\circ}C$ at control, 14.7$^{\circ}C$ at MDNF and 13.3$^{\circ}C$ at PENF from Feb. 6${\sim}$7, 2009. Because of higher temperature, early growth of korea melon of MDNF was better than control at 30 days after transplanting. Days required to harvesting (DRH) of control was 89, those of PENF and MDNF were 88, 78, respectively. First harvesting of MDNF was 11 days earlier than control. Harvested fruit of MDNF had higher weight, soluble solid and marketable fruit ratio than control. Yield ratio of control and PENF was 4:3:3 (early:middle:late harvesting season), but MDNF was 5:3:2. Using of MDNF provided earlier harvesting. Total yield of PENF was similar to control, 1,844kg per lOa, MDNF was increased by 9%.

• Journal of Bio-Environment Control
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• v.8 no.4
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• pp.242-249
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• 1999

This study was conducted to investigate the effect of seedling age and irrigation set point on the growth and yield of white spined cucumber cv Sharp-1. Leaf area, number of lateral vines and root weight measured 70 days after planting were the greatest in 30 day-old seedling treatment. Inorganic element content measured 30 days after planting was the greatest in 30 day-old seedling treatment. Total and marketable yields were greater in 30 day-old seedlings than those of 20 or 40 day-old seedlings. The early yield was the least in 20 day-old seedlings. 40-day old seedlings lost vigor quickly. No significant differences in growth and yield observed as affected by irrigation set point.

• Journal of Bio-Environment Control
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• v.28 no.1
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• pp.46-54
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• 2019

Experiments of local cooling and heating on crown and root zone of forcing cultivation of strawberry 'Seolhyang' using heat pump and root pruning before planting were conducted. During the daytime, the crown surface temperature of the crown local cooling treatment was maintained at $18{\sim}22^{\circ}C$. This is suitable for flower differentiation, while those of control and root zone local cooling treatment were above $30^{\circ}C$. Budding rate of first flower clusters and initial yields were in the order of crown local cooling, root zone local cooling and control in root pruning plantlet and non pruning plantlet, except for purchase plantlet. Those of root pruning plantlet were higher than those of non pruning plantlet. These trends were evident in the yield of the first flower cluster until February 14, 2018, and the effect of local cooling and root pruning decreased from March 9, 2018. The budding rates of the second flower cluster according to the local cooling and root pruning treatments were not noticeable compared to first flower cluster but showed the same tendency as that of first flower cluster. In the heating experiment, root zone local heating(root zone $20^{\circ}C$+inside greenhouse $5^{\circ}C$) and crown local heating(crown $20^{\circ}C$+inside greenhouse $5^{\circ}C$) saved 59% and 65% of heating fuel, respectively, compared to control(inside greenhouse $9^{\circ}C$). Considering the electric power consumption according to the heat pump operation, the heating costs were reduced by 55% and 61%, respectively.

• Proceedings of the KAIS Fall Conference
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• 2002.05a
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• pp.200-202
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• 2002

본 연구는 원예작물의 저장기간동안 특성에 맞는 환경을 조성하고 작물의 초기 수확시 상태를 최대한 보장하기 위해 작물의 변화를 관찰하여 그 데이터를 분석할 수 있도록 한다. 또한 측정된 데이터의 분석을 통하여 작물에 알맞은 환경을 유지하여 그 작물의 상품의 가치틀 향상시키는데 목적이 있다. 따라서 본 논문에서는 인터넷 기반에서 원예산물 등의 물류량을 안정적으로 조절할 수 있도록 총괄적인 데이터를 제공하여 관리할 수 있는 시스템 구성한다.

• Korean journal of applied entomology
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• v.39 no.3
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• pp.141-147
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• 2000

This study was carried out to investigate the population changes of Liriomyza trijolii (Burgess) on chrysanthemum and its relationship to plant growth and damages. In spring culture of chrysanthemum, L. trifolii adults begun to be attracted by the yellow sticky trap from early May and maintained high population until the middle of July. Larval density increased gradually from late May and reached peak in early July. In autumn culture, the population density of adult was lower than that of spring culture but the number of adult was great in late September and the middle of October. This trend was similar to that of larval stage. Damaged leaves by larva could be found from 4 weeks after transplanting and its rate was low until 5 weeks but increased abruptly after 6 weeks and maintained 70% level until flowering stage in spring culture. Damaged leaves increased with plant growth in some varieties tested in this experiment.